Drinking water quality · 2021
· Verified
What's in Gswc-south Arcadia — San Dimas, Ca, CA tap water
11 contaminants were measured in the Gswc-south Arcadia — San Dimas, Ca, CA water system's 2021 annual report. Each is shown below against its federal limit.
- Reporting year
- 2021
- Contaminants measured
- 11
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.4 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.34 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileAt the tap | None set | None detected |
| ManganeseA naturally occurring metal from soil and rock. | 0.65 ug/LAverageSystem-wide | 50 ug/LNL | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 2.5 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 5.1 ug/LAverageSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 1.6 ug/LAverageSystem-wide | None set | Within the limit |
Other
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 2 pCi/LAverageSystem-wide | 20 pCi/LMCL | Detected — no federal limit |
People also ask about Gswc-south Arcadia — San Dimas, Ca, CA's water
+Is Gswc-south Arcadia — San Dimas, Ca, CA tap water safe to drink in 2021?
Every one of the 11 contaminants measured in Gswc-south Arcadia — San Dimas, Ca, CA's 2021 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Gswc-south Arcadia — San Dimas, Ca, CA tap water?
11 contaminants were measured in Gswc-south Arcadia — San Dimas, Ca, CA's 2021 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 6 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Gswc-south Arcadia — San Dimas, Ca, CA's 2021 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Gswc-south Arcadia — San Dimas, Ca, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2021 report; a new report will replace it once the utility publishes its next annual update.